The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A way of figuring out when you can plant portulaca is to look at the USDA zone info for Duvall.

Planting Calendar for Portulaca

Frost tolerance for portulaca:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

It's probably not a good idea to plant portulaca until after the last frost when the weather gets warmer because they require warm weather.

The earliest that you can plant portulaca in Duvall is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant portulaca and expect a good harvest is probably August. If you wait any later than that and your portulaca may not have a chance to really do well. You can get started a little bit earlier by starting your portulaca indoors.

Last Frost Date

On average all chance of frost has passed is on March 15 in Duvall. You should expect an average low temperature of 15°F in the coldest months of winter.

Since the USDA zone info for Duvall may not be accurate from year to year the actual date of last frost is different every year. Half of the time in Duvall last frost occurs after March 15 so make sure that you are prepared to protect your portulaca in the event of one of those late frosts.

USDA Zone Info for Duvall

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°F

This means that on a really cold year, the coldest it will get is 15°F. On most years you should be prepared to experience lows near 20°F.

Plants to Grow in Duvall

You may be interested in your other planting guides for Duvall.